public IEnumerable <Product> Filter(IEnumerable <Product> products, IProductSpecification specification)
{
foreach (var item in products)
{
if (specification.isSatisfied(item))
{
yield return(item);
}
}
}
public Products Filter(IProductSpecification specification)
{
var result = new Products();
foreach (var item in list)
{
var product = (Product)item;
if (specification.SatisfiedBy(product))
{
result.Add(product);
}
}
return(result);
}
public AndSpecification(IProductSpecification spec1, IProductSpecification spec2)
{
this.spec1 = spec1;
this.spec2 = spec2;
}
